The Rail-bridge Interaction – Recent Advances with ERS Fastening System for Steel Bridges

Vibration of Train-Rail-Bridge Interaction Considering Rail Irregularity with Arbitrary Wavelength

A generation method for the rail random irregularity with arbitrary wavelength interval (WI) is developed, and its accuracy and efficiency are demonstrated. Then a moving wheel-rail-bridge interaction element is derived to establish the finite element equations of motion for the train-rail-bridge interaction system, and the flow chart of assembly and calculation for the system equations is give...

A Robotic System for Steel Bridge Maintenance: Field Testing

This paper presents the field testing results of an autonomous manipulator-based robotic system that strips the paint and rust from steel bridges [Liu et al., 2008]. The key components of this system are sensing and planning, which have been presented in other research papers. The grit-blasting field trial presented in this paper spanned 6 weeks, and included 20 hours over 4.5 days of actual gr...

Supplemental system retro t considerations for braced steel bridge piers

Braced piers of steel truss bridges having braces with latticed built-up cross-sections may su er significant damage during earthquakes due to the buckling, rapid strength degradation, and fracture of the braces. One retro t alternative for such a bridge pier is to supplement the existing structural system with a system of energy dissipation devices (or structural fuses) that will yield and dis...

Recent Advances in EMG Pattern Recognition for Prosthetic Control

The dlvhex system for knowledge representation: recent advances (system description)

The DLVHEX system implements the HEX-semantics, which integrates answer set programming (ASP) with arbitrary external sources. Since its first release ten years ago, significant advancements were achieved. Most importantly, the exploitation of properties of external sources led to efficiency improvements and flexibility enhancements of the language, and technical improvements on the system side...